WEBVTT THERE WILL BE MILD AIR INVOLVED IN THE FIRST 2/3 OF THE STORM. NEW SECURITY MEASURES ANNOUNCED FOR THIS YEAR'S BOSTON MARATHON. THE RACE IS NOW JUST SIX WEEKS AWAY. KELLEY TUTHILL IS LIVE WITH THE DETAILS FROM BOYLSTON STREET. THE FINISH LINE LIKE THE WHOLE COURSE WIDE OPEN, NOT CLOSED LIKE A STADIUM. THAT PRESENTS A CHALLENGE TO AUTHORITIES WHO ARE TRYING TO KEEP EVERYONE SAFE WHILE MAINTAINING THE SPIRIT OF THE BOSTON MARATHON. THERE IS NO THREAT AGAINST THE BOSTON MARATHON THIS YEAR BUT YOU HAVE TO LOOK AT THE NATURE OF THE THREAT AND THE NATURE OF THE THREAT IS INTENDED TO STAY OFF OUR RADAR. STATE, LOCAL AND FEDERAL AUTHORITIES EXPLAIN THE ENHANCED SECURITY AT THE MASSACHUSETTS EMERGENCY MANAGEMENT AGENCY BUNKER THAT INCLUDES SOME 3,500 UNIFORMED AND PLAIN CLOTHED OFFICERS ALONG THE 26.2-MILE COURSE. WE EMBARKED ON AN AMBITIOUS TRAINING PROGRAM TONE SURE THAT THE PLAIN CLOTHED OFFICERS AND UNIFORMED RECEIVE FOCUSED TRAINING IN ADVANCE OF THE MARATHON ON DETECTING SUSPICIOUS CONDUCT AND ITEMS. BOMB SNIFFING CANINES ALONG THE ROUTE AND AN EXTENSIVE NETWORK OF SURVEILLANCE CAMERAS WILL KEEP AN EYE ON THE EXPECTED 100 SPECTATORS. RUNNERS NOTIFIED ABOUT RESTRICTIONS ON BACK AND SPECTATORS ARE ASKED TO LEAVE BACKPACKS AT HOME AND CARRY BELONGINGS IN CLEAR PLASTIC BAGS. WE DON'T WANT PEOPLE TO FEEL OR HAVE IT LOOK LIKE A POLICE STATE. THIS IS A GREAT TRADITION IN MASSACHUSETTS AND BOSTON AND ACROSS THE COUNTRY. WE WANT TO MAINTAIN AND PRESERVE IF YOU WILL THAT EXPERIENCE. AND NO WORD YET ON HOW MUCH